This is the world of the Axis Gate book series, the world within and around the earth set in Confluence 42.5 (at least much of the time), around the year 1897. It is a world of alternate history, esoteric steampunk machinery, and low standards for awe.
Cosmic secrets in astral lights. Experiments to glitch the universe. An eccentric wasteland girl. Ancient intelligences. Primordial Gateways. Well-crafted telescopes.
Illuminating all of Orphan Towne with a newfangled invention, "the light bulb" is quite enough excitement for Junior Engineer (Third Class) Alvin Esker, but after discovering Hana, a peculiar girl-who-can't-exist, his familiar world of lectrics and lunches flips on its pole. Before he knows it, he and Hana have triggered an experiment that threatens the survival of Orphan Towne—and possibly a continent. They embark on a trek to the top of the earth, on the trail of the Last Astronomer, to stop the doom they unwittingly caused ... assuming they don't die.